What you will need to do:
Slice and stone your mango, add it into a blender along with a similar volume of yoghurt. Next, sweeten the mixture according to your taste with some sugar. Now, blend for around two minutes. Thin the mixture by adding some milk. Finally, crush some cardamom seeds and add them into the mix. You can also optionally garnish your Lassi with pistachios or a little salt on the rim of the glass.